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Definition of doornail
doornail
/ˈdɔːr.neɪl/
door · nail
Plural:doornails
doornail Lexical Profile
CEFR
C1
Grade
8
Tier
2
Usage
Rare
Syllables
2
doornail Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
A large-headed iron nail formerly used to stud heavy wooden doors for added strength or ornamentation (now used almost exclusively in the simile 'dead as a doornail').
Example
"Without a fresh battery, the old car in the garage is as dead as a doornail."
Word Nuance & Usage
In contemporary English, 'doornail' is virtually restricted to the fixed simile 'dead as a doornail', meaning unmistakably dead, defunct, or inactive.
Word Origin & Etymology
Attested in Middle English by the 14th century, the word combines 'door' and 'nail'. The expression 'dead as a doornail' likely arose from the carpentry practice of 'clenching'—bending over and hammering flat the protruding point of a heavy iron nail driven through a door, rendering it permanently unusable or 'dead'.
Cite this Entry
Wordmom. (2026). Definition of Doornail. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/doornail